$.validator.addMethod("validpassword", function(value, element) {
    return this.optional(element) ||
        /^.*(?=.{8,})(?=.*[a-z])(?=.*[A-Z])(?=.*[\d])(?=.*[\W]).*$/i.test(value);
}, "The password must contain a minimum of one lower case character," +
           " one upper case character, one digit and one special character..");

The above regex does not differentiate between uppercase and lowercase. What's wrong?

$.validator.addMethod("validpassword", function(value, element) {
    return this.optional(element) ||
        /^.*(?=.{8,})(?=.*[a-z])(?=.*[A-Z])(?=.*[\d])(?=.*[\W]).*$/i.test(value);
}, "The password must contain a minimum of one lower case character," +
           " one upper case character, one digit and one special character..");

The above regex does not differentiate between uppercase and lowercase. What's wrong?

• javascript
• jquery
• regex
• jquery-validate
• case-sensitive

1 Answer 1

Remove the i flag. It makes the RegEx case-insensitive. Also, extend [\W] to [\W_].

/^.*(?=.{8,})(?=.*[a-z])(?=.*[A-Z])(?=.*[\d])(?=.*[\W]).*$/i.test(value);
//                                           Remove this   ^

// Ok:
/^.*(?=.{8,})(?=.*[a-z])(?=.*[A-Z])(?=.*[\d])(?=.*[\W_]).*$/.test(value);